Roy loses a tooth and, being a cartoon boy, his tooth is a cute animated tooth, with a penchant for sweets! Initially, the family find Roy's sweet tooth adorable and hilarious, however, the more sugary sweets Toothy eats, the bigger and increasingly hyper he becomes, causing mayhem in the O'Brien household. Roy needs to get Toothy to shrink down in size, so he can put him under his pillow and send him on his merry way to the tooth fairy, but how? Roy wonders what Wonder Roy would do.